What is the primary function of the vocalis muscle?

The primary function of the vocalis muscle is to vibrate the vocal folds for sound production. This muscle is a part of the intrinsic muscles of the larynx and plays a crucial role in modulating the tension and length of the vocal folds. When the vocalis muscle contracts, it allows for the fine-tuning of the pitch produced by the vocal cords, as changes in tension affect the frequency of the vibration. This is essential for phonation, or the production of voiced sounds, enabling a range of pitches and tones in spoken language or singing.

While other muscles in the larynx have roles such as assisting in breathing or stabilizing the larynx, the specific responsibility of the vocalis muscle is centered on sound production through its direct impact on the vocal folds.